We ordered front and rear bars for a 335ix in August 2011. After four weeks, we received a set of sway bars, but the front was for a 335i RWD. We sent it back and waited for the correct bar, which UUC kept saying was "in production." We called once every week or two for months, with the same answer. In January of this year we sent the bars back and cancelled the order.

We ordered front and rear bars for a 335ix in August 2011. After four weeks, we received a set of sway bars, but the front was for a 335i RWD. We sent it back and waited for the correct bar, which UUC kept saying was "in production." We called once every week or two for months, with the same answer. In January of this year we sent the bars back and cancelled the order.

I certainly don't have any hard marketing research to go from. And one might guess that UUC doesn't have a strong demand since they don't keep any in stock. But then again, I would not rely on their business prowess for a second.
Realistically, there are no sway bars available anywhere. UUC claims to sell them but few have ever received them and from what I read, there have been issues with those that have managed to get their hands on them.
There certainly seems to be a market out there for them. Especially from a reputable customer service oriented business.